1806897513 has 16 divisors (see below), whose sum is σ = 2563747200. Its totient is φ = 1128036096.

The previous prime is 1806897509. The next prime is 1806897517. The reversal of 1806897513 is 3157986081.

It is an interprime number because it is at equal distance from previous prime (1806897509) and next prime (1806897517).

It is not a de Polignac number, because 1806897513 - 2² = 1806897509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1806897517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78870 + ... + 99167.

It is an arithmetic number, because the mean of its divisors is an integer number (160234200).

Almost surely, 2^1806897513 is an apocalyptic number.

It is an amenable number.

1806897513 is a deficient number, since it is larger than the sum of its proper divisors (756849687).

1806897513 is a wasteful number, since it uses less digits than its factorization.

1806897513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178256.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 1806897513 is about 42507.6171174061. The cubic root of 1806897513 is about 1217.9921989303.

The spelling of 1806897513 in words is "one billion, eight hundred six million, eight hundred ninety-seven thousand, five hundred thirteen".